Reserve Battery

A reserve battery, also called stand-by battery, is a primary battery where part is isolated until the battery needs to be used. When long storage is required, reserve batteries are often used, since the active chemicals of the cell are segregated until needed, thus reducing self-discharge.

A reserve battery is distinguished from a backup battery, in that a reserve battery is inert until it is activated, while a backup battery is already functional, even if it is not delivering current.

Read more about Reserve Battery:  Uses, Activation, Types

Famous quotes containing the word reserve:

    In a democracy—even if it is a so-called democracy like our white-élitist one—the greatest veneration one can show the rule of law is to keep a watch on it, and to reserve the right to judge unjust laws and the subversion of the function of the law by the power of the state. That vigilance is the most important proof of respect for the law.
    Nadine Gordimer (b. 1923)